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jpegls: K&R formatting cosmetics

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Signed-off-by: Diego Biurrun <diego@biurrun.de>
pull/18/head
Luca Barbato 12 years ago committed by Diego Biurrun
parent 9cacdabd1c
commit ff4fc5ef12
5 changed files with 336 additions and 266 deletions
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  1. 45
      libavcodec/jpegls.c
  2. 40
      libavcodec/jpegls.h
  3. 66
      libavcodec/jpeglsdec.c
  4. 3
      libavcodec/jpeglsdec.h
  5. 76
      libavcodec/jpeglsenc.c

45
libavcodec/jpegls.c
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@ -27,17 +27,19 @@
#include "jpegls.h"
void ff_jpegls_init_state(JLSState *state){
void ff_jpegls_init_state(JLSState *state)
{
int i;
state->twonear = state->near * 2 + 1;
state->range = (state->maxval + state->twonear - 1) / state->twonear + 1;
// QBPP = ceil(log2(RANGE))
for(state->qbpp = 0; (1 << state->qbpp) < state->range; state->qbpp++);
for (state->qbpp = 0; (1 << state->qbpp) < state->range; state->qbpp++)
;
if (state->bpp < 8)
state->limit = 16 + 2 * state->bpp - state->qbpp;
state->limit = 2 * state->bpp - state->qbpp + 16;
else
state->limit = 4 * state->bpp - state->qbpp;
@ -45,45 +47,56 @@ void ff_jpegls_init_state(JLSState *state){
state->A[i] = FFMAX(state->range + 32 >> 6, 2);
state->N[i] = 1;
}
}
/**
* Custom value clipping function used in T1, T2, T3 calculation
*/
static inline int iso_clip(int v, int vmin, int vmax){
if(v > vmax || v < vmin) return vmin;
else return v;
static inline int iso_clip(int v, int vmin, int vmax)
{
if (v > vmax || v < vmin)
return vmin;
else
return v;
}
void ff_jpegls_reset_coding_parameters(JLSState *s, int reset_all){
void ff_jpegls_reset_coding_parameters(JLSState *s, int reset_all)
{
const int basic_t1 = 3;
const int basic_t2 = 7;
const int basic_t3 = 21;
int factor;
if(s->maxval==0 || reset_all) s->maxval= (1 << s->bpp) - 1;
if (s->maxval == 0 || reset_all)
s->maxval = (1 << s->bpp) - 1;
if (s->maxval >= 128) {
factor = FFMIN(s->maxval, 4095) + 128 >> 8;
if (s->T1 == 0 || reset_all)
s->T1= iso_clip(factor*(basic_t1-2) + 2 + 3*s->near, s->near+1, s->maxval);
s->T1 = iso_clip(factor * (basic_t1 - 2) + 2 + 3 * s->near,
s->near + 1, s->maxval);
if (s->T2 == 0 || reset_all)
s->T2= iso_clip(factor*(basic_t2-3) + 3 + 5*s->near, s->T1, s->maxval);
s->T2 = iso_clip(factor * (basic_t2 - 3) + 3 + 5 * s->near,
s->T1, s->maxval);
if (s->T3 == 0 || reset_all)
s->T3= iso_clip(factor*(basic_t3-4) + 4 + 7*s->near, s->T2, s->maxval);
s->T3 = iso_clip(factor * (basic_t3 - 4) + 4 + 7 * s->near,
s->T2, s->maxval);
} else {
factor = 256 / (s->maxval + 1);
if (s->T1 == 0 || reset_all)
s->T1= iso_clip(FFMAX(2, basic_t1/factor + 3*s->near), s->near+1, s->maxval);
s->T1 = iso_clip(FFMAX(2, basic_t1 / factor + 3 * s->near),
s->near + 1, s->maxval);
if (s->T2 == 0 || reset_all)
s->T2= iso_clip(FFMAX(3, basic_t2/factor + 5*s->near), s->T1, s->maxval);
s->T2 = iso_clip(FFMAX(3, basic_t2 / factor + 5 * s->near),
s->T1, s->maxval);
if (s->T3 == 0 || reset_all)
s->T3= iso_clip(FFMAX(4, basic_t3/factor + 7*s->near), s->T2, s->maxval);
s->T3 = iso_clip(FFMAX(4, basic_t3 / factor + 7 * s->near),
s->T2, s->maxval);
}
if(s->reset==0 || reset_all) s->reset= 64;
if (s->reset == 0 || reset_all)
s->reset = 64;
av_dlog(NULL, "[JPEG-LS RESET] T=%i,%i,%i\n", s->T1, s->T2, s->T3);
}

40
libavcodec/jpegls.h
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@ -28,8 +28,8 @@
#ifndef AVCODEC_JPEGLS_H
#define AVCODEC_JPEGLS_H
#include "avcodec.h"
#include "libavutil/common.h"
#include "avcodec.h"
typedef struct JpeglsContext {
AVCodecContext *avctx;
@ -54,19 +54,29 @@ void ff_jpegls_init_state(JLSState *state);
/**
* Calculate quantized gradient value, used for context determination
*/
static inline int ff_jpegls_quantize(JLSState *s, int v){ //FIXME optimize
if(v==0) return 0;
static inline int ff_jpegls_quantize(JLSState *s, int v)
{
if (v == 0)
return 0;
if (v < 0) {
if(v <= -s->T3) return -4;
if(v <= -s->T2) return -3;
if(v <= -s->T1) return -2;
if(v < -s->near) return -1;
if (v <= -s->T3)
return -4;
if (v <= -s->T2)
return -3;
if (v <= -s->T1)
return -2;
if (v < -s->near)
return -1;
return 0;
} else {
if(v <= s->near) return 0;
if(v < s->T1) return 1;
if(v < s->T2) return 2;
if(v < s->T3) return 3;
if (v <= s->near)
return 0;
if (v < s->T1)
return 1;
if (v < s->T2)
return 2;
if (v < s->T3)
return 3;
return 4;
}
}
@ -76,8 +86,8 @@ static inline int ff_jpegls_quantize(JLSState *s, int v){ //FIXME optimize
*/
void ff_jpegls_reset_coding_parameters(JLSState *s, int reset_all);
static inline void ff_jpegls_downscale_state(JLSState *state, int Q){
static inline void ff_jpegls_downscale_state(JLSState *state, int Q)
{
if (state->N[Q] == state->reset) {
state->A[Q] >>= 1;
state->B[Q] >>= 1;
@ -86,7 +96,9 @@ static inline void ff_jpegls_downscale_state(JLSState *state, int Q){
state->N[Q]++;
}
static inline int ff_jpegls_update_state_regular(JLSState *state, int Q, int err){
static inline int ff_jpegls_update_state_regular(JLSState *state,
int Q, int err)
{
state->A[Q] += FFABS(err);
err *= state->twonear;
state->B[Q] += err;

66
libavcodec/jpeglsdec.c
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@ -34,7 +34,6 @@
#include "jpegls.h"
#include "jpeglsdec.h"
/*
* Uncomment this to significantly speed up decoding of broken JPEG-LS
* (or test broken JPEG-LS decoder) and slow down ordinary decoding a bit.
@ -45,7 +44,6 @@
*/
//#define JLS_BROKEN
/**
* Decode LSE block with initialization parameters
*/
@ -86,13 +84,16 @@ int ff_jpegls_decode_lse(MJpegDecodeContext *s)
/**
* Get context-dependent Golomb code, decode it and update context
*/
static inline int ls_get_code_regular(GetBitContext *gb, JLSState *state, int Q){
static inline int ls_get_code_regular(GetBitContext *gb, JLSState *state, int Q)
{
int k, ret;
for(k = 0; (state->N[Q] << k) < state->A[Q]; k++);
for (k = 0; (state->N[Q] << k) < state->A[Q]; k++)
;
#ifdef JLS_BROKEN
if(!show_bits_long(gb, 32))return -1;
if (!show_bits_long(gb, 32))
return -1;
#endif
ret = get_ur_golomb_jpegls(gb, k, state->limit, state->qbpp);
@ -114,7 +115,9 @@ static inline int ls_get_code_regular(GetBitContext *gb, JLSState *state, int Q)
/**
* Get Golomb code, decode it and update state for run termination
*/
static inline int ls_get_code_runterm(GetBitContext *gb, JLSState *state, int RItype, int limit_add){
static inline int ls_get_code_runterm(GetBitContext *gb, JLSState *state,
int RItype, int limit_add)
{
int k, ret, temp, map;
int Q = 365 + RItype;
@ -122,12 +125,15 @@ static inline int ls_get_code_runterm(GetBitContext *gb, JLSState *state, int RI
if (RItype)
temp += state->N[Q] >> 1;
for(k = 0; (state->N[Q] << k) < temp; k++);
for (k = 0; (state->N[Q] << k) < temp; k++)
;
#ifdef JLS_BROKEN
if(!show_bits_long(gb, 32))return -1;
if (!show_bits_long(gb, 32))
return -1;
#endif
ret = get_ur_golomb_jpegls(gb, k, state->limit - limit_add - 1, state->qbpp);
ret = get_ur_golomb_jpegls(gb, k, state->limit - limit_add - 1,
state->qbpp);
/* decode mapped error */
map = 0;
@ -153,7 +159,10 @@ static inline int ls_get_code_runterm(GetBitContext *gb, JLSState *state, int RI
/**
* Decode one line of image
*/
static inline void ls_decode_line(JLSState *state, MJpegDecodeContext *s, void *last, void *dst, int last2, int w, int stride, int comp, int bits){
static inline void ls_decode_line(JLSState *state, MJpegDecodeContext *s,
void *last, void *dst, int last2, int w,
int stride, int comp, int bits)
{
int i, x = 0;
int Ra, Rb, Rc, Rd;
int D0, D1, D2;
@ -170,7 +179,9 @@ static inline void ls_decode_line(JLSState *state, MJpegDecodeContext *s, void *
D1 = Rb - Rc;
D2 = Rc - Ra;
/* run mode */
if((FFABS(D0) <= state->near) && (FFABS(D1) <= state->near) && (FFABS(D2) <= state->near)) {
if ((FFABS(D0) <= state->near) &&
(FFABS(D1) <= state->near) &&
(FFABS(D2) <= state->near)) {
int r;
int RItype;
@ -178,9 +189,8 @@ static inline void ls_decode_line(JLSState *state, MJpegDecodeContext *s, void *
while (get_bits1(&s->gb)) {
int r;
r = 1 << ff_log2_run[state->run_index[comp]];
if(x + r * stride > w) {
if (x + r * stride > w)
r = (w - x) / stride;
}
for (i = 0; i < r; i++) {
W(dst, x, Ra);
x += stride;
@ -205,7 +215,8 @@ static inline void ls_decode_line(JLSState *state, MJpegDecodeContext *s, void *
/* decode run termination value */
Rb = R(last, x);
RItype = (FFABS(Ra - Rb) <= state->near) ? 1 : 0;
err = ls_get_code_runterm(&s->gb, state, RItype, ff_log2_run[state->run_index[comp]]);
err = ls_get_code_runterm(&s->gb, state, RItype,
ff_log2_run[state->run_index[comp]]);
if (state->run_index[comp])
state->run_index[comp]--;
@ -220,7 +231,9 @@ static inline void ls_decode_line(JLSState *state, MJpegDecodeContext *s, void *
} else { /* regular mode */
int context, sign;
context = ff_jpegls_quantize(state, D0) * 81 + ff_jpegls_quantize(state, D1) * 9 + ff_jpegls_quantize(state, D2);
context = ff_jpegls_quantize(state, D0) * 81 +
ff_jpegls_quantize(state, D1) * 9 +
ff_jpegls_quantize(state, D2);
pred = mid_pred(Ra, Ra + Rb - Rc, Rb);
if (context < 0) {
@ -255,7 +268,9 @@ static inline void ls_decode_line(JLSState *state, MJpegDecodeContext *s, void *
}
}
int ff_jpegls_decode_picture(MJpegDecodeContext *s, int near, int point_transform, int ilv){
int ff_jpegls_decode_picture(MJpegDecodeContext *s, int near,
int point_transform, int ilv)
{
int i, t = 0;
uint8_t *zero, *last, *cur;
JLSState *state;
@ -282,7 +297,9 @@ int ff_jpegls_decode_picture(MJpegDecodeContext *s, int near, int point_transfor
else
shift = point_transform + (16 - s->bits);
av_dlog(s->avctx, "JPEG-LS params: %ix%i NEAR=%i MV=%i T(%i,%i,%i) RESET=%i, LIMIT=%i, qbpp=%i, RANGE=%i\n",
av_dlog(s->avctx,
"JPEG-LS params: %ix%i NEAR=%i MV=%i T(%i,%i,%i) "
"RESET=%i, LIMIT=%i, qbpp=%i, RANGE=%i\n",
s->width, s->height, state->near, state->maxval,
state->T1, state->T2, state->T3,
state->reset, state->limit, state->qbpp, state->range);
@ -316,7 +333,8 @@ int ff_jpegls_decode_picture(MJpegDecodeContext *s, int near, int point_transfor
width = s->width * 3;
for (i = 0; i < s->height; i++) {
for (j = 0; j < 3; j++) {
ls_decode_line(state, s, last + j, cur + j, Rc[j], width, 3, j, 8);
ls_decode_line(state, s, last + j, cur + j,
Rc[j], width, 3, j, 8);
Rc[j] = last[j];
if (s->restart_interval && !--s->restart_count) {
@ -328,7 +346,8 @@ int ff_jpegls_decode_picture(MJpegDecodeContext *s, int near, int point_transfor
cur += s->picture_ptr->linesize[0];
}
} else if (ilv == 2) { /* sample interleaving */
av_log(s->avctx, AV_LOG_ERROR, "Sample interleaved images are not supported.\n");
av_log(s->avctx, AV_LOG_ERROR,
"Sample interleaved images are not supported.\n");
av_free(state);
av_free(zero);
return -1;
@ -343,18 +362,16 @@ int ff_jpegls_decode_picture(MJpegDecodeContext *s, int near, int point_transfor
uint8_t *src = s->picture_ptr->data[0];
for (i = 0; i < s->height; i++) {
for(x = off; x < w; x+= stride){
for (x = off; x < w; x += stride)
src[x] <<= shift;
}
src += s->picture_ptr->linesize[0];
}
} else {
uint16_t *src = (uint16_t *)s->picture_ptr->data[0];
for (i = 0; i < s->height; i++) {
for(x = 0; x < w; x++){
for (x = 0; x < w; x++)
src[x] <<= shift;
}
src += s->picture_ptr->linesize[0] / 2;
}
}
@ -365,9 +382,9 @@ int ff_jpegls_decode_picture(MJpegDecodeContext *s, int near, int point_transfor
return 0;
}
AVCodec ff_jpegls_decoder = {
.name = "jpegls",
.long_name = NULL_IF_CONFIG_SMALL("JPEG-LS"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_JPEGLS,
.priv_data_size = sizeof(MJpegDecodeContext),
@ -375,5 +392,4 @@ AVCodec ff_jpegls_decoder = {
.close = ff_mjpeg_decode_end,
.decode = ff_mjpeg_decode_frame,
.capabilities = CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("JPEG-LS"),
};

3
libavcodec/jpeglsdec.h
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@ -36,6 +36,7 @@
*/
int ff_jpegls_decode_lse(MJpegDecodeContext *s);
int ff_jpegls_decode_picture(MJpegDecodeContext *s, int near, int point_transform, int ilv);
int ff_jpegls_decode_picture(MJpegDecodeContext *s, int near,
int point_transform, int ilv);
#endif /* AVCODEC_JPEGLSDEC_H */

76
libavcodec/jpeglsenc.c
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@ -33,16 +33,18 @@
#include "mjpeg.h"
#include "jpegls.h"
/**
* Encode error from regular symbol
*/
static inline void ls_encode_regular(JLSState *state, PutBitContext *pb, int Q, int err){
static inline void ls_encode_regular(JLSState *state, PutBitContext *pb, int Q,
int err)
{
int k;
int val;
int map;
for(k = 0; (state->N[Q] << k) < state->A[Q]; k++);
for (k = 0; (state->N[Q] << k) < state->A[Q]; k++)
;
map = !state->near && !k && (2 * state->B[Q] <= -state->N[Q]);
@ -62,7 +64,9 @@ static inline void ls_encode_regular(JLSState *state, PutBitContext *pb, int Q,
/**
* Encode error from run termination
*/
static inline void ls_encode_runterm(JLSState *state, PutBitContext *pb, int RItype, int err, int limit_add){
static inline void ls_encode_runterm(JLSState *state, PutBitContext *pb,
int RItype, int err, int limit_add)
{
int k;
int val, map;
int Q = 365 + RItype;
@ -71,7 +75,8 @@ static inline void ls_encode_runterm(JLSState *state, PutBitContext *pb, int RIt
temp = state->A[Q];
if (RItype)
temp += state->N[Q] >> 1;
for(k = 0; (state->N[Q] << k) < temp; k++);
for (k = 0; (state->N[Q] << k) < temp; k++)
;
map = 0;
if (!k && err && (2 * state->B[Q] < state->N[Q]))
map = 1;
@ -92,7 +97,9 @@ static inline void ls_encode_runterm(JLSState *state, PutBitContext *pb, int RIt
/**
* Encode run value as specified by JPEG-LS standard
*/
static inline void ls_encode_run(JLSState *state, PutBitContext *pb, int run, int comp, int trail){
static inline void ls_encode_run(JLSState *state, PutBitContext *pb, int run,
int comp, int trail)
{
while (run >= (1 << ff_log2_run[state->run_index[comp]])) {
put_bits(pb, 1, 1);
run -= 1 << ff_log2_run[state->run_index[comp]];
@ -112,7 +119,10 @@ static inline void ls_encode_run(JLSState *state, PutBitContext *pb, int run, in
/**
* Encode one line of image
*/
static inline void ls_encode_line(JLSState *state, PutBitContext *pb, void *last, void *cur, int last2, int w, int stride, int comp, int bits){
static inline void ls_encode_line(JLSState *state, PutBitContext *pb,
void *last, void *cur, int last2, int w,
int stride, int comp, int bits)
{
int x = 0;
int Ra, Rb, Rc, Rd;
int D0, D1, D2;
@ -130,7 +140,9 @@ static inline void ls_encode_line(JLSState *state, PutBitContext *pb, void *last
D2 = Rc - Ra;
/* run mode */
if((FFABS(D0) <= state->near) && (FFABS(D1) <= state->near) && (FFABS(D2) <= state->near)) {
if ((FFABS(D0) <= state->near) &&
(FFABS(D1) <= state->near) &&
(FFABS(D2) <= state->near)) {
int RUNval, RItype, run;
run = 0;
@ -168,14 +180,17 @@ static inline void ls_encode_line(JLSState *state, PutBitContext *pb, void *last
if (err >= state->range + 1 >> 1)
err -= state->range;
ls_encode_runterm(state, pb, RItype, err, ff_log2_run[state->run_index[comp]]);
ls_encode_runterm(state, pb, RItype, err,
ff_log2_run[state->run_index[comp]]);
if (state->run_index[comp] > 0)
state->run_index[comp]--;
} else { /* regular mode */
int context;
context = ff_jpegls_quantize(state, D0) * 81 + ff_jpegls_quantize(state, D1) * 9 + ff_jpegls_quantize(state, D2);
context = ff_jpegls_quantize(state, D0) * 81 +
ff_jpegls_quantize(state, D1) * 9 +
ff_jpegls_quantize(state, D2);
pred = mid_pred(Ra, Ra + Rb - Rc, Rb);
if (context < 0) {
@ -207,13 +222,17 @@ static inline void ls_encode_line(JLSState *state, PutBitContext *pb, void *last
}
}
static void ls_store_lse(JLSState *state, PutBitContext *pb){
static void ls_store_lse(JLSState *state, PutBitContext *pb)
{
/* Test if we have default params and don't need to store LSE */
JLSState state2 = { 0 };
state2.bpp = state->bpp;
state2.near = state->near;
ff_jpegls_reset_coding_parameters(&state2, 1);
if(state->T1 == state2.T1 && state->T2 == state2.T2 && state->T3 == state2.T3 && state->reset == state2.reset)
if (state->T1 == state2.T1 &&
state->T2 == state2.T2 &&
state->T3 == state2.T3 &&
state->reset == state2.reset)
return;
/* store LSE type 1 */
put_marker(pb, LSE);
@ -243,7 +262,8 @@ static int encode_picture_ls(AVCodecContext *avctx, AVPacket *pkt,
p->pict_type = AV_PICTURE_TYPE_I;
p->key_frame = 1;
if(avctx->pix_fmt == AV_PIX_FMT_GRAY8 || avctx->pix_fmt == AV_PIX_FMT_GRAY16)
if (avctx->pix_fmt == AV_PIX_FMT_GRAY8 ||
avctx->pix_fmt == AV_PIX_FMT_GRAY16)
comps = 1;
else
comps = 3;
@ -321,7 +341,8 @@ static int encode_picture_ls(AVCodecContext *avctx, AVPacket *pkt,
width = avctx->width * 3;
for (i = 0; i < avctx->height; i++) {
for (j = 0; j < 3; j++) {
ls_encode_line(state, &pb2, last + j, cur + j, Rc[j], width, 3, j, 8);
ls_encode_line(state, &pb2, last + j, cur + j, Rc[j],
width, 3, j, 8);
Rc[j] = last[j];
}
last = cur;
@ -334,7 +355,8 @@ static int encode_picture_ls(AVCodecContext *avctx, AVPacket *pkt,
width = avctx->width * 3;
for (i = 0; i < avctx->height; i++) {
for (j = 2; j >= 0; j--) {
ls_encode_line(state, &pb2, last + j, cur + j, Rc[j], width, 3, j, 8);
ls_encode_line(state, &pb2, last + j, cur + j, Rc[j],
width, 3, j, 8);
Rc[j] = last[j];
}
last = cur;
@ -345,9 +367,9 @@ static int encode_picture_ls(AVCodecContext *avctx, AVPacket *pkt,
av_free(zero);
av_free(state);
// the specification says that after doing 0xff escaping unused bits in the
// last byte must be set to 0, so just append 7 "optional" zero-bits to
// avoid special-casing.
/* the specification says that after doing 0xff escaping unused bits in
* the last byte must be set to 0, so just append 7 "optional" zero-bits
* to avoid special-casing. */
put_bits(&pb2, 7, 0);
size = put_bits_count(&pb2);
flush_put_bits(&pb2);
@ -378,29 +400,35 @@ static int encode_picture_ls(AVCodecContext *avctx, AVPacket *pkt,
return 0;
}
static av_cold int encode_init_ls(AVCodecContext *ctx) {
static av_cold int encode_init_ls(AVCodecContext *ctx)
{
JpeglsContext *c = (JpeglsContext *)ctx->priv_data;
c->avctx = ctx;
ctx->coded_frame = &c->picture;
if(ctx->pix_fmt != AV_PIX_FMT_GRAY8 && ctx->pix_fmt != AV_PIX_FMT_GRAY16 && ctx->pix_fmt != AV_PIX_FMT_RGB24 && ctx->pix_fmt != AV_PIX_FMT_BGR24){
av_log(ctx, AV_LOG_ERROR, "Only grayscale and RGB24/BGR24 images are supported\n");
if (ctx->pix_fmt != AV_PIX_FMT_GRAY8 &&
ctx->pix_fmt != AV_PIX_FMT_GRAY16 &&
ctx->pix_fmt != AV_PIX_FMT_RGB24 &&
ctx->pix_fmt != AV_PIX_FMT_BGR24) {
av_log(ctx, AV_LOG_ERROR,
"Only grayscale and RGB24/BGR24 images are supported\n");
return -1;
}
return 0;
}
AVCodec ff_jpegls_encoder = { //FIXME avoid MPV_* lossless JPEG should not need them
AVCodec ff_jpegls_encoder = {
.name = "jpegls",
.long_name = NULL_IF_CONFIG_SMALL("JPEG-LS"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_JPEGLS,
.priv_data_size = sizeof(JpeglsContext),
.init = encode_init_ls,
.encode2 = encode_picture_ls,
.pix_fmts = (const enum AVPixelFormat[]) {
AV_PIX_FMT_BGR24, AV_PIX_FMT_RGB24, AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16,
AV_PIX_FMT_BGR24, AV_PIX_FMT_RGB24,
AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16,
AV_PIX_FMT_NONE
},
.long_name = NULL_IF_CONFIG_SMALL("JPEG-LS"),
};

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